Bathtub



FIG. 1 is a top plan view of a bathtub embodying my new design;

FIG. 2 is a perspective view taken from the top, front and left end thereof;

FIG. 3 is a cross sectional view taken on line 3--3 of FIG. 1;

FIG. 4 is a right end elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a bathtub, substantially as shown and described. 